Janet Carter 2000 Version 1.0, April 12, 2000 map USGS Open-File Report USGS OFR00-471 Reston, VA U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr00471_mnlssurf This data set describes areas where the Minnelusa Formation is directly overlain by surficial deposits, as well as those areas where the Minnelusa Formation is absent in the Black Hills area, South Dakota. Data describing where the Minnelusa Formation is directly overlain by surficial deposits and areas where the formation is absent were used in the production of structure-contour maps for the top of the Minnelusa Formation (mnlsscon). This data set was created as part of the Black Hills Hydrology Study (BHHS). The BHHS is a long-term investigation that was initiated in 1990 as a cooperative effort between the U.S. Geological Survey (USGS), the South Dakota Department of Environment and Natural Resources (DENR), and the West Dakota Water Development District. West Dakota represents various local and county cooperators. The purpose of the study is to assess the quantity, quality, and distribution of surface and ground water in the Black Hills area of western South Dakota (Driscoll, 1992). The study area includes parts of Butte, Custer, Fall River, Lawrence, Meade, and Pennington counties in South Dakota. Reviews_Applied_to_Data: This electronic report was subjected to the same review standard that applies to all U.S. Geological Survey reports. Reviewers were asked to check the topological consistency, tolerances, attribute frequencies and statistics, projection, and geographic extent. The reviewers checked the metadata and a_readme.1st files for completeness and accuracy. Related_Spatial_and_Tabular_Data_Sets: Geologic structure contours for the top of the Minnelusa Formation (mnlsscon), and data set of wells with geologic information (mnlsswpt) for the Minnelusa Formation. Also, surficial hydrogeology in the Black Hills study area (hydrogeo). Other_References_Cited: >Driscoll, D.G., 1992, Plan of study for the Black Hills Hydrology > Study, South Dakota: U.S. Geological Survey Open-File Report 92-84, > 10 p. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this Federal Geographic Data Committee-compliant metadata file is intended to document the data set in nonproprietary form, as well as in ARC/INFO format, this metadata file may include some ARC/INFO-specific terminology. 19990714 Ground condition as of 1998 Complete None Planned -104.0706002 -103.25792328 44.52976292 43.40638035 none absent surficial deposits Minnelusa Formation inlandWaters none Black Hills South Dakota none These data should not be used at scales larger than 1:100,000 scale. Janet Carter U.S. Geological Survey Hydrologist mailing and physical address

1608 Mt. View Rd.

Rapid City South Dakota 57702 USA 1-888-275-8747 (605) 355-4523 (jmcarter@usgs.gov) Compilation of this data set and the associated metadata was funded in cooperation with the South Dakota Department of Environment and Natural Resources and the West Dakota Water Development District. SunOS, 5.6, sun4u UNIX ARC/INFO version 8.0.1 U.S. Geological Survey 2000 map Open-File Report OFR00-471 Rapid City, South Dakota U.S. Geological Survey http://water.usgs.gov/lookup/getspatial?ofr00471_mnlsscon Multiple visual checks were done to verify that the attribute data was coincident with the original source map. Polygon topology present. This data set consists of surficial deposits which directly overlie the Minnelusa Formation, as well as areas where the formation is absent or outcrops. Paper plots at 1:100,000 scale were overlaid on the original mylar sheet and outcrop areas and surficial deposits were compared. Janet Carter, U.S. Geological Survey Unpublished material map none none Rapid City, South Dakota U.S. Geological Survey 100000 mylar map 1998 Ground condition based on published data as of July 1998 none The surficial deposits were digitized from the hand-drawn polygons on this mylar map. The outcrop areas for the Minnelusa Formation were plotted on mylar and overlaid on a paper copy of the alluvial deposits in the study area. The outcrop areas and alluvial deposits were taken from the digital data set (hydrogeo). Areas where the Minnelusa Formation was directly overlain by alluvial deposits were determined, and contacts were drawn accordingly. The resulting arcs were then digitized in ARC/INFO and polygon topology was created using the BUILD command. Attributes were then created using the ADDITEM command in ARC. Areas where the formation is absent was determined by the occurrence of an outcrop of an older formation or igneous intrusion. Polygons were then assigned a label of 'surficial', 'outcrop', or 'absent' for the attribute item TYPE. 19980702 First draft of metadata created by gjarrell using FGDCMETA.AML ver. 1.33 07/15/99 on ARC/INFO data set /home/student/gja/meta/mnlssurf 20000412 Vector Point 274 String 549 GT-polygon composed of chains 275 Universal Transverse Mercator 13 0.9996 -105.0 0.0000 500,000 0.0000 coordinate pair 1.0 1.0 Meters North American Datum of 1927 Clarke 1866 6378206.4 294.98 > >MNLSSURF.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 4 12 F 3 > 5 PERIMETER 4 12 F 3 > 9 MNLSSURF# 4 5 B - > 13 MNLSSURF-ID 4 5 B - > 17 UNIT# 4 4 I - > 21 TYPE 15 15 C - > > AREA- Internal number for the area of the polygon PERIMETER- Internal number for the perimeter of the polygon MNLSSURF#- Internal sequence number (i.e. the record number) of the polygon in the ARC file MNLSSURF-ID- User-assigned feature ID UNIT#- User assigned value. Polygons representing outcrop areas were given a unit# value of 14 and surficial, absent, and subsurface areas were give a unit# value of 0 for the Minnelusa Formation. TYPE- User assigned item defining polygon type. Polygons were assigned values of 'surficial', 'absent', 'outcrop', or 'subsurface' in order to distinguish polygon types for the construction of structure-contour maps. none U.S. Geological Survey Ask USGS - Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr00471_mnlssurf Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Export Full coverage 1 http://water.usgs.gov/GIS/dsdl/ofr00471_mnlssurf.e00 Export Full coverage 1 http://water.usgs.gov/GIS/dsdl/ofr00471_mnlssurf.e00.zip SDTS Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/ofr00471_mnlssurf.tgz Other Full coverage zipped 1 http://water.usgs.gov/GIS/dsdl/ofr00-471_mnlssurf_shp.tgz None. This dataset is provided by USGS as a public service. 20041108 U.S. Geological Survey Ask USGS -- Water Webserver Team mailing

445 National Center

Reston VA 20192 1-888-275-8747 (1-888-ASK-USGS) http://answers.usgs.gov/cgi-bin/gsanswers?pemail=h2oteam&subject=GIS+Dataset+ofr00471_mnlssurf FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998